docs: def getSKOSDirectSubs(self, aURI):
          """
          2015-08-19: currenlty not used, inferred from above
          """
          aURI = aURI
          qres = self.rdflib_graph.query("""SELECT DISTINCT ?x
                   WHERE {
                           {
                               { ?x skos:broader <%s> }
                               UNION
                               { <%s> skos:narrower ?s }
                           }
                       FILTER (!isBlank(?x))
                   }
                   """ % (aURI, aURI))
          return list(qres)